Comment by Borealid
8 hours ago
There do exist "evaporative coolers", sometimes called "swamp coolers". The trick is that they require water and raise the humidity of their surroundings. But they tick all the boxes you listed - plenty of delta-t, extremely low power, no external tubes or parts.
It's not magic because it relies on the "fuel" of cool water to evaporate.
I'm not the same guy but I can verify that the advert for the impossible micro-evaporative cooler quoted impossible performance capabilities.
YouTube adverts frequently contain fraudulent, misleading information. It appears that no law is being broken.
I can believe that, I'm just here to point out that some of the laws being not-broken are the laws of thermodnamics. You can cool a room cheaply with dry ice, for instance. There are tricks.
I get what you're saying, that it's "thermodynamics violation OR trick". But if you're checking whether the ad is lying at face value, you exclude tricks like dry ice or precooling.